VoIP - IP Telephony White Papers
Speech Codecs
Overview Speech has remained the most desirable medium of communication between humans. Analogue telecommunication of speech has become a cumbersome and inflexible process when transmission power and spectral utilization, the foremost resources in any communication system are considered. Digital transmission of speech is more versatile achieving lower costs, consistent quality, security and spectral efficiency in the systems that exploit it. The first stage of digitalization of speech involves sampling and quantization. While the minimum sampling frequency is limited by the Nyquist criterion, the number of quantiser levels is generally determined by the degree of faithful reconstruction (quality) of the signal required at the receiver.
| Publisher | Wipro | File Format | |
|---|---|---|---|
| Date Published | July 2001 | Downloads | 93 |
| Format | White Papers | ||
| Topics | |||
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